diff --git a/CVE-2023-0836.patch b/CVE-2023-0836.patch
new file mode 100644
index 0000000000000000000000000000000000000000..67677723fca6d3d469186102081a81948c22b69b
--- /dev/null
+++ b/CVE-2023-0836.patch
@@ -0,0 +1,41 @@
+From 2e6bf0a2722866ae0128a4392fa2375bd1f03ff8 Mon Sep 17 00:00:00 2001
+From: Youfu Zhang <zhangyoufu@gmail.com>
+Date: Fri, 9 Dec 2022 19:15:48 +0800
+Subject: [PATCH] BUG/MAJOR: fcgi: Fix uninitialized reserved bytes
+
+The output buffer is not zero-initialized. If we don't clear reserved
+bytes, fcgi requests sent to backend will leak sensitive data.
+
+This patch must be backported as far as 2.2.
+---
+ src/fcgi.c |    8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/src/fcgi.c b/src/fcgi.c
+index dcf2db2..1d1a82b 100644
+--- a/src/fcgi.c
++++ b/src/fcgi.c
+@@ -47,7 +47,7 @@ int fcgi_encode_record_hdr(struct buffer *out, const struct fcgi_header *h)
+ 	out->area[len++] = ((h->len >> 8) & 0xff);
+ 	out->area[len++] = (h->len & 0xff);
+ 	out->area[len++] = h->padding;
+-	len++; /* rsv */
++	out->area[len++] = 0; /* rsv */
+ 
+ 	out->data = len;
+ 	return 1;
+@@ -94,7 +94,11 @@ int fcgi_encode_begin_request(struct buffer *out, const struct fcgi_begin_reques
+ 	out->area[len++] = ((r->role >> 8) & 0xff);
+ 	out->area[len++] = (r->role & 0xff);
+ 	out->area[len++] = r->flags;
+-	len += 5; /* rsv */
++	out->area[len++] = 0; /* rsv */
++	out->area[len++] = 0;
++	out->area[len++] = 0;
++	out->area[len++] = 0;
++	out->area[len++] = 0;
+ 
+ 	out->data = len;
+ 	return 1;
+-- 
+1.7.10.4
diff --git a/haproxy.spec b/haproxy.spec
index 5da1a6bd184cb26ae219abe7d588f6956ecf4602..b8b786aa14e80a98cf6878d962039adbced0fa47 100644
--- a/haproxy.spec
+++ b/haproxy.spec
@@ -5,7 +5,7 @@
 
 Name:             haproxy
 Version:          2.6.6
-Release:          6
+Release:          7
 Summary:          The Reliable, High Performance TCP/HTTP Load Balancer
 
 License:          GPLv2+
@@ -28,6 +28,7 @@ Patch8:           backport-BUG-MEDIUM-connection-Preserve-flags-when-a-conn-is-.
 Patch9:           backport-BUG-MINOR-protocol-fix-minor-memory-leak-in-protocol.patch
 Patch10:          backport-BUG-MEDIUM-stream-do-not-try-to-free-a-failed-stream.patch
 Patch11:          backport-BUG-MINOR-server-inherit-from-netns-in-srv_settings_.patch
+Patch12:          CVE-2023-0836.patch
 
 BuildRequires:    gcc lua-devel pcre2-devel openssl-devel systemd-devel systemd libatomic
 %ifarch sw_64
@@ -132,6 +133,9 @@ exit 0
 %{_mandir}/man1/*
 
 %changelog
+* Fri Dec 1 2023 liningjie <liningjie@xfusion.com> - 2.6.6-7
+- Fix CVE-2023-0836
+
 * Wed Sep 27 2023 xinghe <xinghe2@h-partners.com> - 2.6.6-6
 - Type:bugfix
 - CVE:NA